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/*
* Copyright (c) 2013-2016 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#include <Swift/Controllers/Chat/ChatMessageParser.h>
#include <memory>
#include <utility>
#include <vector>
#include <boost/algorithm/string.hpp>
#include <Swiften/Base/Regex.h>
#include <Swiften/Base/String.h>
#include <SwifTools/Linkify.h>
namespace Swift {
ChatMessageParser::ChatMessageParser(const std::map<std::string, std::string>& emoticons, HighlightRulesListPtr highlightRules, bool mucMode)
: emoticons_(emoticons), highlightRules_(highlightRules), mucMode_(mucMode) {
}
typedef std::pair<std::string, std::string> StringPair;
ChatWindow::ChatMessage ChatMessageParser::parseMessageBody(const std::string& body, const std::string& nick, bool senderIsSelf) {
ChatWindow::ChatMessage parsedMessage;
std::string remaining = body;
if (boost::starts_with(body, "/me ")) {
remaining = String::getSplittedAtFirst(body, ' ').second;
parsedMessage.setIsMeCommand(true);
}
/* Parse one, URLs */
while (!remaining.empty()) {
bool found = false;
std::pair<std::vector<std::string>, size_t> links = Linkify::splitLink(remaining);
remaining = "";
for (size_t i = 0; i < links.first.size(); i++) {
const std::string& part = links.first[i];
if (found) {
// Must be on the last part, then
remaining = part;
}
else {
if (i == links.second) {
found = true;
parsedMessage.append(std::make_shared<ChatWindow::ChatURIMessagePart>(part));
}
else {
parsedMessage.append(std::make_shared<ChatWindow::ChatTextMessagePart>(part));
}
}
}
}
/* do emoticon substitution */
parsedMessage = emoticonHighlight(parsedMessage);
if (!senderIsSelf) { /* do not highlight our own messsages */
/* do word-based color highlighting */
parsedMessage = splitHighlight(parsedMessage, nick);
}
return parsedMessage;
}
ChatWindow::ChatMessage ChatMessageParser::emoticonHighlight(const ChatWindow::ChatMessage& message) {
ChatWindow::ChatMessage parsedMessage = message;
std::string regexString;
/* Parse two, emoticons */
for (StringPair emoticon : emoticons_) {
/* Construct a regexp that finds an instance of any of the emoticons inside a group
* at the start or end of the line, or beside whitespace.
*/
regexString += regexString.empty() ? "" : "|";
std::string escaped = "(" + Regex::escape(emoticon.first) + ")";
regexString += "^" + escaped + "|";
regexString += escaped + "$|";
regexString += "\\s" + escaped + "|";
regexString += escaped + "\\s";
}
if (!regexString.empty()) {
regexString += "";
boost::regex emoticonRegex(regexString);
ChatWindow::ChatMessage newMessage;
for (std::shared_ptr<ChatWindow::ChatMessagePart> part : parsedMessage.getParts()) {
std::shared_ptr<ChatWindow::ChatTextMessagePart> textPart;
if ((textPart = std::dynamic_pointer_cast<ChatWindow::ChatTextMessagePart>(part))) {
try {
boost::match_results<std::string::const_iterator> match;
const std::string& text = textPart->text;
std::string::const_iterator start = text.begin();
while (regex_search(start, text.end(), match, emoticonRegex)) {
int matchIndex = 0;
for (matchIndex = 1; matchIndex < static_cast<int>(match.size()); matchIndex++) {
if (match[matchIndex].length() > 0) {
//This is the matching subgroup
break;
}
}
std::string::const_iterator matchStart = match[matchIndex].first;
std::string::const_iterator matchEnd = match[matchIndex].second;
if (start != matchStart) {
/* If we're skipping over plain text since the previous emoticon, record it as plain text */
newMessage.append(std::make_shared<ChatWindow::ChatTextMessagePart>(std::string(start, matchStart)));
}
std::shared_ptr<ChatWindow::ChatEmoticonMessagePart> emoticonPart = std::make_shared<ChatWindow::ChatEmoticonMessagePart>();
std::string matchString = match[matchIndex].str();
std::map<std::string, std::string>::const_iterator emoticonIterator = emoticons_.find(matchString);
assert (emoticonIterator != emoticons_.end());
const StringPair& emoticon = *emoticonIterator;
emoticonPart->imagePath = emoticon.second;
emoticonPart->alternativeText = emoticon.first;
newMessage.append(emoticonPart);
start = matchEnd;
}
if (start != text.end()) {
/* If there's plain text after the last emoticon, record it */
newMessage.append(std::make_shared<ChatWindow::ChatTextMessagePart>(std::string(start, text.end())));
}
}
catch (std::runtime_error) {
/* Basically too expensive to compute the regex results and it gave up, so pass through as text */
newMessage.append(part);
}
}
else {
newMessage.append(part);
}
}
parsedMessage.setParts(newMessage.getParts());
}
return parsedMessage;
}
ChatWindow::ChatMessage ChatMessageParser::splitHighlight(const ChatWindow::ChatMessage& message, const std::string& nick) {
ChatWindow::ChatMessage parsedMessage = message;
for (size_t i = 0; i < highlightRules_->getSize(); ++i) {
const HighlightRule& rule = highlightRules_->getRule(i);
if (rule.getMatchMUC() && !mucMode_) {
continue; /* this rule only applies to MUC's, and this is a CHAT */
} else if (rule.getMatchChat() && mucMode_) {
continue; /* this rule only applies to CHAT's, and this is a MUC */
} else if (rule.getAction().getTextBackground().empty() && rule.getAction().getTextColor().empty()) {
continue; /* do not try to highlight text, if no highlight color is specified */
}
const std::vector<boost::regex> keywordRegex = rule.getKeywordRegex(nick);
for (const boost::regex& regex : keywordRegex) {
ChatWindow::ChatMessage newMessage;
for (std::shared_ptr<ChatWindow::ChatMessagePart> part : parsedMessage.getParts()) {
std::shared_ptr<ChatWindow::ChatTextMessagePart> textPart;
if ((textPart = std::dynamic_pointer_cast<ChatWindow::ChatTextMessagePart>(part))) {
try {
boost::match_results<std::string::const_iterator> match;
const std::string& text = textPart->text;
std::string::const_iterator start = text.begin();
while (regex_search(start, text.end(), match, regex)) {
std::string::const_iterator matchStart = match[0].first;
std::string::const_iterator matchEnd = match[0].second;
if (start != matchStart) {
/* If we're skipping over plain text since the previous emoticon, record it as plain text */
newMessage.append(std::make_shared<ChatWindow::ChatTextMessagePart>(std::string(start, matchStart)));
}
std::shared_ptr<ChatWindow::ChatHighlightingMessagePart> highlightPart = std::make_shared<ChatWindow::ChatHighlightingMessagePart>();
highlightPart->text = match.str();
highlightPart->action = rule.getAction();
newMessage.append(highlightPart);
start = matchEnd;
}
if (start != text.end()) {
/* If there's plain text after the last emoticon, record it */
newMessage.append(std::make_shared<ChatWindow::ChatTextMessagePart>(std::string(start, text.end())));
}
}
catch (std::runtime_error) {
/* Basically too expensive to compute the regex results and it gave up, so pass through as text */
newMessage.append(part);
}
} else {
newMessage.append(part);
}
}
parsedMessage.setParts(newMessage.getParts());
}
}
return parsedMessage;
}
}
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Swift